CN110336178B - Broadband optical parameter chirped pulse amplifier insensitive to temperature variation - Google Patents
Broadband optical parameter chirped pulse amplifier insensitive to temperature variation Download PDFInfo
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- 239000000395 magnesium oxide Substances 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/0602—Crystal lasers or glass lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/1083—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering using parametric generation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/163—Solid materials characterised by a crystal matrix
- H01S3/1671—Solid materials characterised by a crystal matrix vanadate, niobate, tantalate
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
- G02F1/392—Parametric amplification
Abstract
The invention relates to a broadband optical parametric chirped pulse amplifier insensitive to temperature change, which comprises a first pulse laser, a second pulse laser, a stretcher and a periodically polarized crystal. By enabling the non-collinear angle among the signal light, the pump light and the idler frequency light to simultaneously meet the angle relation required by insensitivity to wavelength and temperature change, the optical parametric chirped pulse amplifier can realize wide-bandwidth signal light amplification (insensitivity to wavelength change) and can effectively relieve phase mismatch (insensitivity to temperature change) of a nonlinear crystal caused by local overhigh temperature. The periodic domain inversion structure of the periodically poled crystal has such a structure that k isp(T0)、ks(T0)、ki(T0) And kgThe capability of forming a wave vector quadrangle by four paths of wave vectors enables the optical parametric chirped pulse amplifier to meet the requirement of phase matching, so that the conversion efficiency of the optical parametric chirped pulse amplifier in a high average power mode is improved.
Description
Technical Field
The invention relates to the technical field of laser, in particular to a broadband optical parametric chirped pulse amplifier insensitive to temperature change.
Background
In the prior art, only a very small number of lasers of a specific wavelength can be directly generated from an stimulated emission laser medium due to the lack of a suitable laser gain medium (meaning a substance system used to achieve population inversion and produce stimulated emission amplification of light). Optical parametric amplification (meaning that a beam of high-frequency light and a beam of low-frequency light enter a nonlinear medium at the same time, and the light with low frequency in the outgoing light is amplified due to difference frequency effect, and this phenomenon is called optical parametric amplificationpTo a frequency of omegasOn signal light of (ω)p>ωs) At the same time, a third frequency ω is obtainedi(ωp＝ωs+ωi) Is called an idler light. Optical parametric amplifiers have been widely used in scientific research, medicine, industry, etc. to obtain higher power laser output. As an effective means for generating ultrashort ultrastrong pulsed laser, an Optical Parametric Chirped Pulse Amplifier (OPCPA) based on OPA has wide application in many fields, and the basic principle is as follows: broadening a beam of low-energy femtosecond broadband signal light to be amplified in a time domain by introducing chirp dispersion (the broadened pulse laser is represented as a chirped pulse laser in the time domain), and then carrying out parametric amplification on the broadened chirped signal light and another beam of high-energy narrowband pump light (typical pulse width is about tens of picoseconds) in a nonlinear crystal; in the process, energy is transferred from the pump light to the signal light, and the signal light generates idler frequency light while being amplified; the amplified signal light is recompressed into femtosecond pulse laser by a chirp dispersion compensation method.
Phase Matching (hereinafter referred to as PM) is a fundamental requirement of optical parametric amplification, and in the optical parametric amplification process, Phase Matching is satisfied, which is beneficial to continuously transferring energy from pump light to signal light, thereby greatly improving the conversion efficiency of pump light. However, in general, the phase matching condition is sensitive to wavelength and temperature, and the deviation of the wavelength or temperature will destroy the original phase matching, resulting in the reduction of the conversion efficiency of the optical parametric amplifier.
For the OPCPA, on one hand, the gain bandwidth is a key index for measuring the shortest pulse laser output, and the shorter the pulse width of the signal light, the wider the bandwidth, the higher the requirement on the gain bandwidth of the OPCPA (the requirement on insensitivity to wavelength variation). On the other hand, the absorption of the nonlinear crystal to the laser energy is more serious along with the increase of the pump light power, which causes the increase of the local temperature of the nonlinear crystal and the uneven distribution of the crystal refractive index, so that the phase matching cannot be always satisfied in the whole crystal region, and the thermally induced phase mismatch seriously affects the conversion efficiency of the optical parametric amplification (the requirement is insensitive to the temperature change). Therefore, it is desirable for high average power optical parametric chirped pulse amplifiers to be simultaneously wavelength insensitive and temperature insensitive.
The inventors have found that in the prior art, the gain bandwidth, or alternatively, the temperature bandwidth, of an optical parametric chirped pulse amplifier can be significantly increased in a non-collinear phase matching manner and with a suitable non-collinear angle. However, in the prior art, the non-collinear phase matching structure insensitive to wavelength and temperature variation has different requirements on the non-collinear angle, so that the phase matching condition insensitive to wavelength and temperature variation cannot be simultaneously realized in the same non-collinear phase matching structure, thereby reducing the conversion efficiency of the high-average-power broadband optical parametric chirped pulse amplifier and narrowing the gain bandwidth.
Disclosure of Invention
The invention mainly aims to provide a broadband optical parametric chirped pulse amplifier insensitive to temperature change, and aims to solve the technical problem that the phase matching condition is insensitive to wavelength and temperature change in the same non-collinear phase matching structure in the prior art.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
broadband insensitive to temperature changeAn optical parametric chirped pulse amplifier comprises a first pulse laser, a second pulse laser, a stretcher and a periodically poled crystal, wherein a signal light generated by the first pulse laser passes through the stretcher and then is coupled with a pump light generated by the second pulse laser in the periodically poled crystal, energy is transferred from the pump light to the signal light during coupling so as to amplify the signal light and simultaneously generate an idler frequency light, the signal light, the pump light and the idler frequency light which pass through the periodically poled crystal are non-collinear, and non-collinear angles among the signal light, the pump light and the idler frequency light can simultaneously meet an angle relation required by insensitivity to wavelength and temperature change, and a periodic domain inversion structure of the periodically poled crystal has the effect that k is enabled to be insensitive to temperature changes(T0)、kp(T0)、ki(T0) And kgThe capability of the four wave vectors to form a wave vector quadrangle, ks(T0) Indicating the phase matching temperature T0Wave vector of central wavelength of the signal light, kp(T0) Indicating the phase matching temperature T0Wave vector of central wavelength of the pump light, ki(T0) Indicating the phase matching temperature T0Wave vector of the idler center wavelength, k g2 pi/Λ, denotes the reciprocal lattice vector of the periodically poled crystal, Λ denotes the poling period of the periodically poled crystal.
Wherein the angular relationship required for insensitivity to wavelength variation is:
vicosβ＝vs
wherein v isiRepresenting the idler group velocity, vsRepresenting the signal light group velocity.
The angle relation required for insensitivity to temperature change is as follows:
wherein α represents an angle between the pump light and the signal light in the transmission direction, and β represents an angle between the signal light and the idler light in the transmission directionAngle kp(T) denotes a wave vector, k, of the pump lights(T) represents a wave vector of the signal light, ki(T) represents the wavevector of the idler light, T0Represents the phase matching temperature of the periodically poled crystal, and represents the operating temperature of the periodically poled crystal.
Wherein the tilt angle of the periodically poled crystal is adjustable.
The broadband optical parametric chirped pulse amplifier insensitive to temperature change further comprises a reflector, and pump light generated by the second pulse laser is coupled with signal light passing through the stretcher in the periodically polarized crystal after passing through the reflector.
The broadband optical parametric chirped pulse amplifier insensitive to temperature change further comprises a compressor, and the amplified signal light is compressed through the compressor.
The periodic polarized crystal is a periodic polarized lithium niobate crystal meeting the quasi-phase matching of class 0, wherein the periodic polarized lithium niobate crystal contains 5% of magnesium oxide.
Wherein the first pulse laser is a femtosecond pulse laser.
The first pulse laser is a mid-infrared femtosecond pulse laser or a titanium gem femtosecond pulse laser.
Wherein the second pulse laser is a picosecond pulse laser.
According to the broadband optical parametric chirped pulse amplifier insensitive to temperature change, the non-collinear angle among the signal light, the pump light and the idler frequency light simultaneously meets the angle relation required by insensitivity to wavelength and temperature change, so that the optical parametric chirped pulse amplifier can realize broadband signal light amplification (insensitivity to wavelength change) and can effectively relieve phase mismatch (insensitivity to temperature change) of a nonlinear crystal caused by overhigh local temperature. The periodic domain inversion structure of the periodically poled crystal has such a structure that k isp(T0)、ks(T0)、ki(T0) And kgFour-way wave vector structureThe capability of wave-forming vector quadrangle enables the optical parametric chirped pulse amplifier to meet the requirement of phase matching. The phase matching condition of the optical parameter chirped pulse amplifier is insensitive to wavelength and temperature change, so that the peak power and the average power of the output pulse laser can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Figure 1 is a schematic diagram of a broadband optical parametric chirped pulse amplifier that is insensitive to temperature variations according to one embodiment of the present invention.
Fig. 2 is a graph of polarization period Λ as a function of non-collinear angle α between pump light and signal light, in accordance with an embodiment of the present invention.
Fig. 3a to 3c are two-dimensional light spots and frequency spectrums of an optical parametric chirped pulse amplifier based on three different phase matching structures at a preset phase matching temperature according to an embodiment of the present invention, wherein the insets are the two-dimensional light spots and frequency spectrums of the initial signal light.
Fig. 3d-3f are two-dimensional light spots and frequency spectrums of the optical parametric chirped pulse amplifier based on three different phase matching structures at a temperature deviating from a preset phase matching temperature according to one embodiment of the present invention, wherein the insets are the two-dimensional light spots and frequency spectrums of the initial signal light.
Figures 4a-4b are graphs of gain spectrum and temperature bandwidth for a broadband photoparametric chirped pulse amplifier insensitive to temperature variations in accordance with one embodiment of the present invention when the polarization period Λ' is in error with respect to the preset value Λ.
Figures 4c-4d are graphs of gain spectra and temperature bandwidths obtained by adjusting the tilt angle of a periodically poled crystal when the poling period Λ' has an error with respect to a preset value Λ for a broadband photoparametric chirped pulse amplifier that is insensitive to temperature variations, according to one embodiment of the present invention.
FIG. 5 is a schematic diagram of tilt angle adjustment in the horizontal dimension for a periodically poled crystal according to one embodiment of the present invention.
10. A broadband optical parametric chirped pulse amplifier insensitive to temperature variation; 1. a first pulse laser; 2. a second pulse laser; 3. a stretcher; 4. periodically polarizing the crystal; 5. a mirror; 6. a compressor; 7. a signal light; 8. pump light; 9. an idler light.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Figure 1 is a schematic diagram of a broadband optical parametric chirped pulse amplifier that is insensitive to temperature variations according to one embodiment of the present invention.
As can be seen from the figure, the broadband optical parametric chirped pulse amplifier 10 insensitive to temperature variation has a first pulse laser 1, a second pulse laser 2, a stretcher 3 and a periodically poled crystal 4, a signal light generated by the first pulse laser 1 is coupled with a pump light generated by the second pulse laser 2 in the periodically poled crystal 4 after passing through the stretcher 3, energy is transferred from the pump light to the signal light during the coupling process so as to amplify the signal light and simultaneously generate an idler light, wherein the signal light 7, the pump light 8 and the idler light 9 passing through the periodically poled crystal 4 are non-collinear, and the non-collinear angles among each other can simultaneously satisfy the angle relation required by insensitivity to wavelength and temperature variation, and the periodic domain inversion structure of the periodically poled crystal 4 has the function of enabling k to be non-collinears(T0)、kp(T0)、ki(T0) And kgCapability of four wave vectors to form a wave vector quadrangle, ks(T0) Indicating the phase matching temperature T0Wave vector k of center wavelength of lower signal light 7p(T0) Indicating the phase matching temperature T0Wave vector k of central wavelength of lower pump light 8i(T0) Indicating the phase matching temperature T0Wave vector, k, of center wavelength of the down idler 9g2 pi/Λ, denotes the reciprocal lattice vector of the periodically poled crystal 4, and Λ denotes the poling period of the periodically poled crystal 4.
In this embodiment, the non-collinear angles between the signal light 7, the pump light 8, and the idler-frequency light 9 satisfy the angle relationship required to be insensitive to wavelength and temperature variation, so that the optical parametric chirped pulse amplifier 10 can achieve wide-bandwidth signal light amplification (insensitive to wavelength variation) and effectively alleviate phase mismatch (insensitive to temperature variation) of the periodically-polarized crystal 4 due to local over-high temperature. The periodic domain inversion structure of the periodically poled crystal 4 has such a structure that k isp(T0)、ks(T0)、ki(T0) And kgThe ability of the four-way wave vectors to form a wave-vector quadrilateral enables the optical parametric chirped pulse amplifier 10 to meet phase matching requirements. Since the phase matching condition of the optical parametric chirped pulse amplifier 10 is insensitive to wavelength and temperature variation, the peak power and average power of the output pulse laser can be increased.
In this example, the angular relationship required for insensitivity to wavelength variation is:
vicosβ＝vs
wherein v isiRepresenting the idler group velocity, vsRepresenting the signal light group velocity.
The angular relationship required for insensitivity to temperature change is:
wherein α denotes the transmission of the pump light 8 and the signal light 7The angle in the direction, β represents the angle in the transmission direction of the signal light 7 and the idler frequency light 9, T0Denotes the phase matching temperature of the periodically poled crystal 4, T denotes the operating temperature of the periodically poled crystal 4, ks(T) denotes a wave vector, k, of the signal light 7p(T) denotes the wavevector of the pump light 8, ki(T) represents the wavevector of the idler light 9.
In the present embodiment, the optical parametric chirped pulse amplifier 10 may have a mirror 5, and the pump light generated in the vertical direction by the second pulse laser 2 is reflected by the mirror 5. The signal light generated in the horizontal direction by the first pulse laser 1 is broadened by the stretcher 3. The pump light passing through the mirror 5 and the signal light passing through the stretcher 3 are coupled in the periodically poled crystal 4.
In this embodiment, the optical parametric chirped pulse amplifier 10 may have a compressor 6, and the amplified signal light is compressed into an ultra-short pulse laser with high peak power through the compressor 6.
In this example, the first pulse laser 1 is a 3.4 μm mid-infrared femtosecond pulse laser with a pulse width of 35fs, and the output 3.4 μm signal light is stretched to 10ps chirped pulse laser by the stretcher 3. The second pulse laser 2 is a 1064nm picosecond pulse laser with the pulse width of 15ps, and 1064nm pump light output by the second pulse laser is reflected by a reflecting mirror 5.
As shown in fig. 2, in the present embodiment, the periodically poled crystal 4 is a periodically poled lithium niobate crystal (PPLN) satisfying quasi-phase matching of class 0, wherein the periodically poled lithium niobate crystal contains 5% magnesium oxide (MgO). at a preset operating temperature of 24.5 ℃, a 3.4 μm pulsed laser is used as a signal light, a 1064nm pulsed laser is used as a pump light, and a 5% MgO-doped PPLN crystal is used as the periodically poled crystal 4. on the premise that an angle relationship required for insensitivity to wavelength and temperature variation is satisfied, the optical chirped parametric pulse amplifier is insensitive to wavelength along with a difference of a non-collinear angle α, or the chirped parametric chirped pulse amplifier is insensitive to temperature, a poling period Λ corresponding to one of the linearly poled crystal 4 exists, and the change curves of two poling periods meet at a specific non-collinear angle (α ≈ 1.5 °), that the non-chirped angle α and the poling period Λ corresponding to the meeting point, the optical chirped crystal 4 and the poling period 3.7 are constructed so that the optical signals are insensitive to temperature along a specific poling angle of a domain inversion angle of a domain on the poling angle of the poling pulse 3.7, 3.9, 3, and 3.
To verify the performance of the optical parametric chirped pulse amplifier 10 of the embodiment, assume that the diameter of a spot of the broadened 3.4 μm chirped pulse laser in the non-collinear transmission dimension is 1mm, the length of the periodically poled crystal 4 is 5mm, and the intensity of the pump light is 450MW/cm2The initial light intensity of the 3.4 μm chirped pulse laser was 1 ‰ of the pump light, the operation of the optical parametric chirped pulse amplifier 10 was numerically simulated according to the refractive index formula of the periodically poled crystal 4, and in order to further prove its superiority, the simulation values were compared with those of the temperature-insensitive optical parametric chirped pulse amplifier (corresponding to point B in fig. 2, the angle τ was 83.6 °, the poling period Λ was 3.4 μm, α was 4.5 °, β was 5.5 °), and the wavelength-insensitive optical parametric chirped pulse amplifier (corresponding to point a in fig. 2, the angle τ was 83.3 °, the poling period Λ was 2.6 μm, α was 4.5 °, and β was 9.3 °).
As shown in fig. 3a-3c, the initial bandwidth of the signal light is 420 nm. At a preset phase matching temperature (Δ T ═ 0 ℃), since both the wavelength-insensitive optical parametric chirped pulse amplifier (fig. 3b) and the optical parametric chirped pulse amplifier 10 (fig. 3c) of the present embodiment satisfy the phase matching condition of a wide bandwidth, both have similar conversion efficiencies (42% and 40% respectively), and correspondingly, the bandwidths of the output signal light 7 are-390 nm and-380 nm respectively, and the original spectral characteristics are basically retained; since the temperature-insensitive optical parametric chirped pulse amplifier (fig. 3a) does not satisfy the phase matching condition of wide bandwidth, the temperature-insensitive optical parametric chirped pulse amplifier suffers from severe gain narrowing, the conversion efficiency is only-20.6%, and the spectral bandwidth of the output signal light 7 is only-185 nm.
In the high average power mode of operation, the absorption of laser energy by periodically poled crystal 4 causes the actual operating temperature to deviate from the preset operating temperature. As shown in fig. 3d-3f, when the temperature is raised to 62.5 ℃ (Δ T ═ 40 ℃), the conversion efficiency of the temperature-insensitive optical parametric chirped pulse amplifier (fig. 3d) and the optical parametric chirped pulse amplifier 10 (fig. 3f) of the present embodiment and the spectrum of the output signal light 7 do not change significantly compared to the phase matching condition at room temperature, while the conversion efficiency of the wavelength-insensitive optical parametric chirped pulse amplifier (fig. 3e) is reduced from original-42% to-12%, and the spectral bandwidth of the output signal light 7 is also reduced from original-390 nm to-210 nm, which indicates that the optical parametric chirped pulse amplifier is very sensitive to the temperature change and cannot meet the application requirement of the high-average-power optical chirped pulse amplifier.
The inventors have found that in practical situations, errors between the domain structure of the periodically poled crystal produced and the desired domain structure may exist, thereby affecting the performance of the optical parametric chirped pulse amplifier, the following describes the effect of the errors of the periodically poled crystal 4 on the poling period Λ on the optical parametric chirped pulse amplifier 10, assuming that the periodically poled crystal 4 is free of errors in the poling direction τ, assuming that the angle α between the pump light 8 and the signal light 7 is constant, as shown in fig. 4(a) -4 (b), the effect of the errors of the poling period on the performance of the optical parametric chirped pulse amplifier 10 may be reduced by varying the poling period Λ' of the periodically poled crystal 4 from the predetermined value Λ, and increasing the errors, as shown in fig. 4(c) -4(d), by adjusting the tilt angle of the periodically poled crystal 4, the poling direction τ of the periodically poled crystal 4 may be changed, thereby reducing the effect of the errors of the poling period on the performance of the optical parametric chirped pulse amplifier 10, as shown in fig. 4(c) -4(d), by adjusting the tilt angle of the periodically poled crystal 4, the tilt angle may be adjusted, thereby compensating the performance of the periodically poled crystal 4, and the original poling period of the poling crystal 4, and the temperature of the poling period may.
In an alternative embodiment, the first pulse laser 1 is 800nm titanium sapphire femtosecond pulse laser, the second pulse laser 2 is 532nm picosecond pulse laser, and specifically, the included angle α between the pump light 8 and the signal light 7 in the transmission direction is 7.2 °, the included angle β between the signal light 7 and the idler frequency light 9 in the transmission direction is 15.4 °, correspondingly, in order to satisfy the class 0 quasi-phase matching, the included angle τ between the direction of the periodic domain inversion of the periodically poled crystal 4 and the transmission direction of the signal light 7 is 80.6 °, and the poling period Λ is 1.2 μm.
The above is a description of the broadband optical parametric chirped pulse amplifier insensitive to temperature variation, and those skilled in the art will appreciate that the embodiments of the present invention may be modified in various ways, and in summary, the present disclosure should not be construed as limiting the present invention.
Claims (7)
1. A broadband optical parametric chirped pulse amplifier insensitive to temperature change comprises a first pulse laser, a second pulse laser, a stretcher and a periodically poled crystal, wherein a signal light generated by the first pulse laser is coupled with a pump light generated by the second pulse laser in the periodically poled crystal after passing through the stretcher, energy is transferred from the pump light to the signal light during the coupling process so that the signal light is amplified, and an idler light is generated, wherein the signal light, the pump light and the idler light passing through the periodically poled crystal are non-collinear, and the non-collinear angles among the signal light, the pump light and the idler light can simultaneously satisfy the angle relation required by insensitivity to wavelength and temperature change, and the periodic domain inversion structure of the periodically poled crystal has the effect that k is enabled to be insensitive to temperature changes(T0)、kp(T0)、ki(T0) And kgThe capability of the four wave vectors to form a wave vector quadrangle, ks(T0) Indicating the phase matching temperature T0Wave vector of central wavelength of the signal light, kp(T0) Indicating the phase matching temperature T0Wave vector of central wavelength of the pump light, ki(T0) Indicating the phase matching temperature T0Wave vector of the idler center wavelength, kg2 pi/Λ, representing the reciprocal lattice vector of the periodically poled crystal, Λ representing the poling period of the periodically poled crystal;
the angular relationship required for insensitivity to wavelength variation is:
vicosβ＝vs
wherein v isiRepresenting the idler group velocity, vsThe angular relation required for representing the signal light group velocity and being insensitive to temperature variation is as follows:
wherein α denotes an angle between the pump light and the signal light in the transmission direction, β denotes an angle between the signal light and the idler light in the transmission direction, and kp(T) denotes a wave vector, k, of the pump lights(T) represents a wave vector of the signal light, ki(T) represents the wavevector of the idler light, T0Represents the phase matching temperature of the periodically poled crystal, and represents the working temperature of the periodically poled crystal;
the inclination angle of the periodically poled crystal is adjustable.
2. The broadband optical parametric chirped pulse amplifier according to claim 1, wherein the optical parametric chirped pulse amplifier further comprises a mirror, and the pump light generated by the second pulse laser is coupled with the signal light after passing through the stretcher after passing through the mirror in the periodically poled crystal.
3. The broadband optical parametric chirped pulse amplifier according to claim 1, wherein the optical parametric chirped pulse amplifier further comprises a compressor, and the amplified signal light is compressed by the compressor.
4. The broadband photoparametric chirped pulse amplifier insensitive to temperature variations according to claim 1, characterized in that the periodically poled crystal is a periodically poled lithium niobate crystal satisfying a class 0 quasi-phase matching, wherein the periodically poled lithium niobate crystal contains 5% magnesium oxide.
5. The broadband photoparametric chirped pulse amplifier insensitive to temperature variations according to claim 1, characterized in that the first pulse laser is a femtosecond pulse laser.
6. The broadband photoparametric chirped pulse amplifier insensitive to temperature variations according to claim 5, characterized in that the first pulse laser is a mid-infrared femtosecond pulse laser or a titanium-sapphire femtosecond pulse laser.
7. The broadband optical parametric chirped pulse amplifier according to claim 1, wherein the second pulse laser is a picosecond pulse laser.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2051137A1 (en) * | 2007-10-16 | 2009-04-22 | Stichting voor Fundamenteel Onderzoek der Materie | Laser system and method for generating and amplifying optical pulses with a tunable output wavelength between approximately 0.75 and 2.5 µm |
| CN106410577A (en) * | 2016-10-19 | 2017-02-15 | 上海交通大学 | Temperature-and-wavelength-insensitive optical parametric chirped-pulse amplifier |
| JP2017116725A (en) * | 2015-12-24 | 2017-06-29 | 澁谷工業株式会社 | Electromagnetic wave generator |
| CN108075356A (en) * | 2016-11-16 | 2018-05-25 | 苏州旭创科技有限公司 | The insensitive laser of heat based on soi structure |
| CN108155554A (en) * | 2018-01-31 | 2018-06-12 | 深圳大学 | A kind of photoparametric laser amplifier preparation method and photoparametric laser amplifier |
| CN108281877A (en) * | 2018-03-14 | 2018-07-13 | 成都师范学院 | Chirped laser pulse frequency spectrum shaping system based on spectrum angle dispersion |
| US10191354B1 (en) * | 2018-03-02 | 2019-01-29 | Shanghai Jiao Tong University | Multi-parameter noncollinear phase-matching for high-average-power optical parametric chirped-pulse amplifier |
Family Cites Families (2)
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| CN106911056B (en) * | 2017-05-08 | 2019-02-22 | 深圳大学 | A kind of broadband optical parameter chirped pulse amplification device |
| CN110336178B (en) * | 2019-08-06 | 2020-06-30 | 深圳大学 | Broadband optical parameter chirped pulse amplifier insensitive to temperature variation |
-
2019
- 2019-08-06 CN CN201910721527.6A patent/CN110336178B/en active Active
- 2019-11-05 WO PCT/CN2019/115561 patent/WO2021022691A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2051137A1 (en) * | 2007-10-16 | 2009-04-22 | Stichting voor Fundamenteel Onderzoek der Materie | Laser system and method for generating and amplifying optical pulses with a tunable output wavelength between approximately 0.75 and 2.5 µm |
| JP2017116725A (en) * | 2015-12-24 | 2017-06-29 | 澁谷工業株式会社 | Electromagnetic wave generator |
| CN106410577A (en) * | 2016-10-19 | 2017-02-15 | 上海交通大学 | Temperature-and-wavelength-insensitive optical parametric chirped-pulse amplifier |
| US9711931B1 (en) * | 2016-10-19 | 2017-07-18 | Shanghai Jiao Tong University | Noncollinear achromatic phase matching based optical parametric chirped-pulse amplifier with insensitivity to temperature and wavelength |
| CN108075356A (en) * | 2016-11-16 | 2018-05-25 | 苏州旭创科技有限公司 | The insensitive laser of heat based on soi structure |
| CN108155554A (en) * | 2018-01-31 | 2018-06-12 | 深圳大学 | A kind of photoparametric laser amplifier preparation method and photoparametric laser amplifier |
| US10191354B1 (en) * | 2018-03-02 | 2019-01-29 | Shanghai Jiao Tong University | Multi-parameter noncollinear phase-matching for high-average-power optical parametric chirped-pulse amplifier |
| CN108281877A (en) * | 2018-03-14 | 2018-07-13 | 成都师范学院 | Chirped laser pulse frequency spectrum shaping system based on spectrum angle dispersion |
Non-Patent Citations (1)
| Title |
|---|
| "Temperature- and wavelength-insensitive parametric amplification enabled by noncollinear achromatic phase-matching";Daolong Tang 等;《Scientific Reports》;20161031;第36059页 * |
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